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kobusy [5.1K]
3 years ago
11

The radius of a cylindrical gift box is (2x+3) in. The height of the gift box is twice the radius. What is the surface area of t

he cylinder? Write your answer as a polynomial in standard form.
Mathematics
1 answer:
inessss [21]3 years ago
3 0
SA=2pir^2+2hpir=2pir(r+h)
h=2r=2(2x+3)=4x+6

SA=2pi(2x+3)(2x+3+4x+6)
SA=(4x+6)(pi)(6x+9)
SA=24πx²+27πx+54π
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This year the United States, China is right behind us - Answer is *A*

Step-by-step explanation:

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D) | Is side-side-angle a congruence rule? Is angle-side-side<br> a congruence rule? Explain.
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Answer:

Look at step-by-step explanation

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Side-side-angle is not a congruence rule because a side cannot be in between an angle and a side. Angle-side-side is the same thing, a side cannot be in between an angle and a side.

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BlackZzzverrR [31]

Answer:

x=81 or 1/3

Step-by-step explanation:

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3 0
3 years ago
PLEASE HELP. WILL GIVE BRAINLIEST
KengaRu [80]

Answer:

x-intercepts = 1,2, and 4, y-intercept = -8

Step-by-step explanation:

x^3 - 7x^2 - 14x - 8 in factored form is equal to (x-1)(x-2)(x-4).

Solving for x-intercepts:

  • We are actually able to solve for all x-intercepts without the given factor. But since we are given one of the factors, our job becomes much easier.
  • Using synthetic division, or long division, we factor out the x-intercept 4. Which leaves us with the polynomial x^2 - 3x + 2.
  • From here we can separate the polynomial into two binomials.
  • x^2 - 3x + 2 = (x-1)(x-2). Giving us all 3 x-intercepts.
  • Using Descartes' rules we can identify before even starting the problem how many real x-intercepts there are (Not needed for this problem).

Solving for y-intercept:

  • The y-intercept is always the coefficient that does not have any assigned x-variables.
  • The coefficient is -8, thus the y-intercept.
  • If unsure of the y-intercept, you can always plug in x = 0. Solving for the y-intercept will give you the value of f(0).
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4 0
3 years ago
2. Given that the radius of the Earth is 6340 Km. calculate the Surface Acer of earth <br>​
serious [3.7K]

Answer:

Step-by-step explanation:

The surface area of a sphere (which the earth is considered to be) = 4 pi r^2

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r = 6340

Area = 4 * 3.14 * 6340 * 6340 = 504856736 square km.

You should either round this to 505,000,000 or express a value in scientific notation.

5.05 * 10^8

6 0
3 years ago
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